Bellingham + Stanley OPTi Digital Range Refractometer – Life Science

Refractometers play small but vital role within the life science sector for both human and veterinary use. Whether the need is to control the sugar content of sports drinks prior to consumption or to track hydration levels of our athletes taking part in a sporting event, the duo scale OPTi-Sport is the right for the job. Similarly in the veterinary field, the OPTi-Vet is used to ascertain sugar levels of animal urine, large and small, as part of a diagnostic procedure.

  • Features
  • Specifications
  • Scales + Models

The OPTi-Aquarium also has two scales expressing seawater concentration in either parts per thousand (PPT) or specific gravity (SG) and is not only used as a means to test the salt content of fish tanks at home or within the fish farming industry (aquaculture) but also in our shipping industries, where seawater is used as an engine coolant, and as an environmental tool to track the stability and degradation of our rare wetlands and salt plains.

The OPTi also plays an important part in horse and rare animal breeding too, where the instrument is used to monitor mares milk colostrum quality to ensure the correct levels of immunoglobin is being delivered during those first few days of life!

Automatic Temperature Compensation (ATC) ICUMSA, None or Application Specific (model dependent)
Working temperature range 5-40°C
Sample temperature range 5-90°C
Temperature sensor accuracy ±1°C (5–40°C)
Measurement time 2 seconds
Relative humidity 95% RH (non condensing)
Battery power indicator Yes
Sample indicator High, Low or No sample
IP rating IP65 water resistant
Battery type 3V 2 x AAA (LR03)
Battery life expectation 10000 readings (minimum)


Prism material Optical glass
Prism seal Silicon rubber and Viton
Sample dish 316 stainless steel
Sample surface diameter 8mm
Sample volume 0.3ml
Case material Acrylonitrile Butadiene Styrene (ABS)


Shipping Information
Dimensions (unpacked) L/W/H 12.0 x 5.5 x 3.5cm
Dimensions (packed) L/W/H 19.0 x 9.0 x 5.0cm
Weight (unpacked) 0.1kg
Weight (packed) DIN 0.2kg
Dimensions 10 units (packed) L/W/H 31.0 x 19.0 x 20.5cm
Weight 10 units (packed) DIN 2.5kg
Commodity code 90275000

OPTi Custom

In the event that a particular model is not listed below or scales unique to a particular product be required, an OPTi Custom may be offered. Please contact our Sales Team.

Single Scale Models

38-02 Brix 54 Sugar % (°Brix) 0-54 0.1 ±0.2 Bx
38-16 Hi RI 1.54 NTC Refractive Index (RI) 1.42-1.54 0.0001 ±0.0003 NONE
38-19 Brix 54 NTC Sugar % (°Brix) 0-54 0.1 ±0.2 NONE
38-20 RI 1.42 Refractive Index (RI) 1.33-1.42 0.0001 ±0.0003 Bx
38-A2 RI 1.54+ Refractive Index (RI) 1.33-1.54 0.0001 ±0.0003 Bx
38-B9 RI 1.54+ NTC Refractive Index (RI) 1.33-1.54 0.0001 ±0.0003 NONE
38-22 Starch 30 Starch % 0-30 0.1 ±0.2 Bx
38-23 Urea 40 % Urea (CRC data) 0-40 0.1 ±0.2 AUS32
38-28 Saline 28 Salinity (% NaCl) 0-28 0.1 ±0.2 NaCl
38-29 Adblue® % Urea (AUS-32) 0-40 0.1 ±0.2 AUS32
38-32 Hi RI 1.54 Refractive Index (RI) 1.42-1.54 0.0001 ±0.0003 Bx
38-34 Hi Brix 85 Sugar % (°Brix) 0-85 0.1 ±0.2 Bx

Dual Scale Models

38-51 Aquatic A
Seawater PPT (Parts Per Thousand)
Seawater Specific Gravity (SG)
38-52 Sport A
Urine Specific Gravity (SG) Human (not IVD)
Sugar % (°Brix)
1.000-1.050 0-30 0.0005 0.1 ±0.001 ±0.2 Bx Bx
38-53 Vet A
Urine Specific Gravity (SG) Small Mammal
Urine Specific Gravity (SG) Large Mammal
38-56 Colostral A B °Brix Colostral Quality 0-35 POOR/-PASS 0.1 PASS/gOOD ±0.2 Bx Bx
38-A3 Brix 95/Honey+ A B Sugar % (°Brix) Water in Honey % 0-95 10-30 0.1 0.1 ±0.2 ±0.2 Bx Honey
38-B1 Brix 95/RI 1.54+ A B Sugar % (°Brix) Refractive Index (RI) 0-95 1.33-1.54 0.1 0.0001 ±0.2 ±0.0003 Bx Bx

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